import java.util.Scanner;
public class Main {
    public static void main(String[] args) throws Exception {
    

        // Scanner scanner = new Scanner(System.in); 
        // System.out.print("Input your name: ");
        // String name = scanner.nextLine();
        // System.out.print("Input your age: ");
        // int age = scanner.nextInt();
        // System.out.printf("Hi, %s, you are %d\n", name, age);
    

        Scanner sc = new Scanner(System.in);
        System.out.println("per score：");
        int lastScore = sc.nextInt();
        System.out.println("this score：");
        int thisScore = sc.nextInt();
        double percentOfScoreImprove = ((double)thisScore-lastScore)/lastScore*100;
        System.out.printf("up：%.2f%%",percentOfScoreImprove);
        System.out.println(" ");

        if(){



}

}
    
}
